concertina movement

hi guys,
i got a project in which we have to design a moving object using a concertina mechanism. with that being said, i was wondering if there was any existing transport system thats relevant or product or anything which can be any use to draw ideas from.

many thanks

what’s a concertina mechanism?

The only things I have ever seen are snake robots – nothing in transportation.

Probably not quite what you had in mind, but there are a lot of buses like this: